anonymous
  • anonymous
Determine two pairs of polar coordinates for the point (5, -5) with 0° ≤ θ < 360°.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@amistre64 or ANYONE seriously...
anonymous
  • anonymous
Answers to choose from: (5 , 315°), (-5 , 135°) (5 , 45°), (-5 , 225°) (5 , 135°), (-5 , 315°) (5 , 225°), (-5 , 45°)
amistre64
  • amistre64
polar coordinants have the form: (r,angle) r is the distance from origin, and the angle is the inverse tangent of y/x

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anonymous
  • anonymous
i still dont understand
amistre64
  • amistre64
might help to plot the point
amistre64
  • amistre64
|dw:1371142411211:dw|
amistre64
  • amistre64
do you know how to find the distance a point is from the origin?
anonymous
  • anonymous
i do i just dont remember:/
amistre64
  • amistre64
\[d=\sqrt{x^2+y^2}\] in this case, they like to call d ... r
amistre64
  • amistre64
for the angle, you will have to either see it by observation, or be able to deduce it with some inverse trig
anonymous
  • anonymous
i think its between the first one and the third one because of how it's plotted on the unit circle
amistre64
  • amistre64
(5 , 315°), (-5 , 135°) (5 , 45°), (-5 , 225°) , its not 45 since its underneath the axis (5 , 135°), (-5 , 315°) (5 , 225°), (-5 , 45°) , , its not 45 since its underneath the axis that narrow it down to (5 , 315°), (-5 , 135°) (5 , 135°), (-5 , 315°)
amistre64
  • amistre64
the plot is closest to 360 ... so id say the first one is accurate
anonymous
  • anonymous
Okay thank youu
amistre64
  • amistre64
youre welcome, that was more by deduction than mathing :)

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